I know it's probably not a serious comment, but I doubt he can beat six consecutive number one years in a row after Nadal stopped it last year...
Also, Federer would have to keep his ranking until around Wimbledon to pass Pete's record, not out of the question, but it'll be tough defending some of those points.

True, he'll never break 6 years ending number one. But he has ended number one 6 years in a row at a different point in the year, or at least I think someone else has said such.